JP2007153587A - Brake releasing device of elevator hoisting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake releasing device of an elevator hoisting machine capable of surely releasing a brake device, when braking force of the brake device is large, and even when used for an elevator device without a machine room. <P>SOLUTION: This brake releasing device is provided with a releasing wire 10 having one end part arranged in the brake device and releasing the brake device by moving by a predetermined distance to the other end part side, a releasing wire winding drum 14 connected with the other end part of this releasing wire and capable of winding the releasing wire, a support stage 13 rotatably supporting this releasing wire winding drum, and a handle part 15 manually rotating the releasing wire winding drum; and is constituted so that the releasing wire can be wound by a required quantity by the releasing wire winding drum when releasing the brake device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a brake release device for manually releasing a brake device of an elevator hoisting machine.

  The elevator hoisting machine that drives the elevator car automatically stops the rotation of the driving sheave on which the car suspension means such as ropes and belts are wound, in case the power is cut off due to power failure etc. A braking device is provided. When the power of the hoisting machine is actually cut off due to a power failure or the like, the elevator car is restrained from rotating at the driving sheave by the brake device, so that it is independent of the stop position during normal operation. It is forcibly stopped.

  In this way, when the elevator car stops at a position different from the stop position during normal operation by operating the brake device, in order to rescue passengers in the car, the brake device is released to release the drive line. It is necessary to make the car turnable and move the car to the nearest floor landing. For this reason, the elevator hoisting machine is provided with a brake release device for manually releasing the operated brake device.

  In addition, as a conventional brake release device for manually releasing the brake device of the elevator hoisting machine, one end of the release wire is connected to the brake arm of the electromagnetic brake, and the other end of the release wire is in the length direction. And an arm that pivots about a fulcrum of the intermediate portion, and a rod-shaped handle member that is detachably provided in a direction intersecting the length direction of the arm on the other side in the length direction of the arm. It has been proposed to release the electromagnetic brake by moving the release wire a predetermined distance to the other end side by tilting the arm to one side (see, for example, Patent Document 1).

JP 2000-318943 A

  In the brake release device for an elevator hoist described in Patent Document 1, the release wire is moved to the other end side by tilting the arm to one side. The amount of movement of the connecting portion between the arm and the release wire when tilted was limited. For this reason, the movement amount of the release wire necessary for releasing the brake device may not be ensured.

  The above problem is particularly problematic when a brake device having a large braking force is released or when a brake device used in a hoisting machine for a machine room-less elevator is released. That is, when the braking force of the brake device is large, the tension acting on the release wire when the brake device is released increases, and thus the elongation of the release wire inevitably increases. This elongation of the release wire increases the amount of movement of the release wire required to release the brake device, and the brake device may not be released sufficiently even if the arm is tilted completely. It was.

  In addition, machine room-less elevator hoisting machines are usually placed at the top of the hoistway or in the pit, so that the elevator maintenance workers are hoisting, unlike when the hoisting machine is installed in the machine room. It takes a lot of time and labor to go to the place where the machine is installed. For this reason, it is common that the brake release device is permanently installed between the hoisting machine and the landing as in the one described in Patent Document 1. However, since the brake release device is permanently installed between the hoist and the landing, it is necessary to reliably prevent malfunction during normal operation of the elevator, etc., and the release operation of the brake release device after tilting the arm It was necessary to set a large amount of movement of the release wire until so-called play, so-called play. Due to this play, the amount of movement of the release wire necessary to release the brake device becomes large, and the brake device cannot be fully released even when the arm is completely tilted.

  Further, in the machine room-less elevator device, the hoisting machine and the arm are installed at a distance from each other, so that the elongation when the brake device is released increases in proportion to the length of the release wire. It was a factor.

  The present invention has been made to solve the above-described problems, and its purpose is to ensure the braking device even when the braking force of the braking device is large or when used in a machine room-less elevator device. It is an object of the present invention to provide a brake release device for an elevator hoisting machine that can be released.

  A brake release device for an elevator hoisting machine according to the present invention includes a release wire that releases one end portion of the brake device and is moved a predetermined distance to the other end side. Release wire take-up drum connected to the end and capable of winding the release wire, a support base for rotatably supporting the release wire take-up drum, and a handle portion for manually rotating the release wire take-up drum It is equipped with.

  In this invention, one end is provided in the brake device, and the release wire that releases the brake device is connected to the other end by moving a predetermined distance to the other end, and the other end of the release wire is connected, and the release wire is wound. The release wire take-up drum that can be taken off, a support that rotatably supports the release wire take-up drum, and a handle that manually rotates the release wire take-up drum Even when the braking force of the device is large or when used in a machine room-less elevator device, the brake device can be reliably released.

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
FIG. 1 is a front view of a brake device for an elevator hoist according to Embodiment 1 of the present invention. FIG. 1 shows a state in which a drive sheave (not shown) of the elevator hoisting machine is braked by the brake device. In FIG. 1, reference numeral 1 denotes a substantially cylindrical shape, a brake drum that rotates in conjunction with a drive sheave around which elevator car suspension means (not shown) is wound, and 2 is an inner peripheral surface of the brake drum 1. When pressed against the formed braking surface 1a, the brake shoe 3 stops the rotation of the brake drum 1 by the frictional force generated between the braking surface 1a and 3 has a substantially arc shape, and the brake shoe 2 is convex. The brake arm is fixed to the side center.

  Here, the brake arm 3 is disposed inside the cylinder of the brake drum 1 symmetrically in FIG. 1 so that the convex side thereof is along the braking surface 1 a of the brake drum 1. And each upper end part rotates to the fixing member 5 arrange | positioned in the center inside the cylinder of the brake drum 1 via the pin 4 arrange | positioned substantially parallel to the rotating shaft (not shown) of the brake drum 1. It is supported freely. Further, the lower end portions of the brake arm 3 are always urged in the direction away from each other by a push spring 6 provided between the brake arm 3 and the fixing member 5. That is, each brake arm 3 is always urged by the pressing spring 6 so as to rotate outward about the pin 4, that is, so that the brake shoe 2 is pressed against the braking surface 1 a of the brake drum 1. .

  Reference numeral 7 denotes a movable iron core provided at the center of the concave side of each brake arm 3, and reference numeral 8 is provided on the fixed member 5 so as to oppose each movable iron core 7. The movable iron core 7 is adsorbed by being energized. It is an electromagnetic magnet.

  In the elevator hoisting brake device having the above-described configuration, energization to the electromagnetic magnet 8 is stopped during braking, and each brake arm 3 is urged outward about the pin 4 by the urging force of the push spring 6. The For this reason, the brake shoe 2 provided at the center of the convex side of each brake arm 3 is pressed against the braking surface 1a with a predetermined force, and a frictional force for braking is generated between each brake shoe 2 and the braking surface 1a. appear. In this state, a predetermined gap g is formed between the movable iron core 7 and the electromagnetic magnet 8.

  On the other hand, when releasing the brake device and allowing the drive sheave to rotate, energization of the electromagnetic magnet 8 is started, and each brake arm 3 causes the pin 4 to be pulled by the attractive force of the electromagnetic magnet 8 to the movable iron core 7. It is biased inward to the center. Each brake arm 3 rotates about the pin 4 until the movable iron core 7 comes into contact with the electromagnetic magnet 8, and a gap corresponding to the gap g is formed between the brake shoe 2 and the braking surface 1a.

  Next, a brake release device for manually releasing the brake device in a braking state will be described. In FIG. 1, reference numeral 9 denotes a release plate that is provided at the lower end of each brake arm 3 and interlocks with the brake arm 3, and is disposed to face each other so as to be orthogonal to the expansion / contraction direction of the push spring 6. Yes. Reference numeral 10 denotes a release wire that is inserted into a through hole formed in the lower end portion of each release plate 9 and is provided with a stopper 10a from the through hole at one end portion. Reference numeral 11 denotes one release plate 9 at one end portion. The release wire cover is provided at the edge of the formed through hole, and the release wire 10 is inserted through the hollow portion.

  FIG. 2 is a front view of the brake release device of the elevator hoisting machine according to Embodiment 1 of the present invention, and shows an operation side operated by an elevator maintenance worker in the brake release device. In FIG. 2, reference numeral 12 denotes a release device base installed in a place where maintenance workers can easily work, such as an elevator machine room and a landing, 13 a support base fixed to the upper surface of the release device base 12, and 14 a support base 13. The release wire winding drum 15, which is rotatably supported at the center, has a predetermined length that rotates in conjunction with the release wire winding drum 14 by being provided at the center of the release wire winding drum 14. A handle 16 is provided at both ends of the handle 15 and is a handle for manually rotating the handle 15. A handle 17 is provided on the upper surface of the release device base 12 and is disposed on one side of the release wire winding drum 14. It is a fixed plate. The handle 15 and the handle 16 constitute a handle portion for manually rotating the release wire winding drum 14.

  Here, the release wire cover 11 is laid in the hoistway from one end portion provided on one release plate 9, and the other end portion is connected to a through-hole edge formed in the fixed plate 17. Yes. In addition, the release wire 10 has one end portion provided in the brake device as described above, an intermediate portion thereof inserted into the hollow portion of the release wire cover 11, and the other end portion having a through hole formed in the fixing plate 17. It is connected to the outer peripheral surface of the release wire winding drum 14 through.

  In order to prevent the release wire 10 from moving during normal operation of the elevator, the handle 15 is fixed at a predetermined position by a lock mechanism (not shown) or the like. In such a state, only the tip of the other end portion of the release wire 10 is wound around the release wire take-up drum 14, and a retaining plate 10a provided at one end portion of the releasing wire 10 and a release plate adjacent to the retaining wire 10a. A predetermined gap “a” is formed between the two.

  Next, an operation for releasing the brake device in order to rescue the passenger when the passenger is trapped in the car due to a power failure or the like will be described. The elevator maintenance worker goes to the place where the operation side of the brake release device is installed, and first releases the lock mechanism of the handle 15 so that the handle 15 can be rotated. Next, by rotating the handle 15 to one side, the release wire 10 is wound on the release wire winding drum 14 as much as necessary, and the release wire 10 is moved to the other end side by a predetermined distance to release the brake device. Let

  That is, by starting the winding of the release wire 10 onto the release wire winding drum 14, only the release wire 10 is first moved to the other end side. And by this winding operation, the release wire 10 moves to the other end side by a distance corresponding to the gap a, so that the retaining stopper 10a provided at one end of the release wire 10 contacts the adjacent release plate 9 To do. Thereafter, the winding operation of the release wire 10 is further continued, so that the release plate 9 adjacent to the stopper 10a is urged toward the other end of the release wire 10 by the stopper 10a. When the lower end of the brake arm 3 is moved against the urging force of the push spring 6, each brake arm 3 rotates inwardly about the pin 4, and the brake shoe 2 is separated from the braking surface 1a. Is done.

  Note that the release wire is in a relaxed state from when the release operation of the release wire 10 is started until the release operation of the brake device is started, that is, until the stopper 10a comes into contact with the adjacent release plate 9. Since 10 only moves to the other end side, the load hardly acts on the maintenance worker who operates the handle 15. On the other hand, after the stopper 10a contacts the release plate 9, it is necessary to move the brake arm 3 inward against the urging force of the push spring 6, so that the maintenance worker who winds the release wire 10 is also predetermined. The load of acts.

  Here, the urging force of the push spring 6 is large enough to stop the rotation of the drive sheave by pressing the brake shoe 2 against the braking surface 1a. Therefore, the length of the handle 15, the installation position of the handle 16, and the like are determined manually by a general maintenance worker based on the biasing force of the push spring 6, the diameter of the release wire winding drum 14, and the like. It is set so that it can be wound on the release wire winding drum 14.

  According to Embodiment 1 of the present invention, since the release wire 10 can be wound up as much as necessary by the release wire winding drum 14, the release wire 10 is moved to the other end side to release the brake device. In addition, the movement amount of the release wire 10 is not limited by the inclination angle of the arm as in the prior art, and the movement amount of the release wire 10 can be freely adjusted according to the number of rotations of the handle portion. Therefore, even when the brake device having a large braking force is released or when the brake device used in the hoisting machine of the machine room-less elevator is released, the length of the release wire 10 and the length of play of the release wire 10 are increased. Accordingly, the brake device can be reliably released by increasing the rotation speed of the handle portion.

  In addition, since the brake device can be reliably released regardless of the elongation of the release wire 10 when releasing the brake device, the release wire 10 is lengthened and the hoisting machine and the operation side of the brake release device are separated. Can be installed at a place. For this reason, even in the case of a machine room-less elevator device in which the hoisting machine is arranged at the top of the hoistway or at the pit, the handle portion can be arranged at a position where it can be operated from a predetermined elevator landing. It is also possible to improve the work time.

  Further, when the handle portion becomes large, the handle 15 and the handle 16 are configured to be detachable from the release wire winding drum 14, and a lock that restricts the rotation of the release wire winding drum 14 during normal operation. By providing the mechanism, it is possible to easily cope with a space-saving device such as a machine room-less elevator device.

Embodiment 2. FIG.
FIG. 3 is a front view of a brake release device for an elevator hoist according to Embodiment 2 of the present invention. In FIG. 3, 18 is a round handle having a substantially disk shape that is provided on one side of the release wire winding drum 14 and rotates in conjunction with the release wire winding drum 14. The round handle 18 is disposed so as to have the same rotation axis as the release wire winding drum 14.

  When the brake device releasing operation by the brake releasing device is finished, the elevator maintenance worker reverses the round handle 18 when winding the release wire 10 in order to return the brake device to the original state, that is, the braking state. Rotate in the direction. At this time, since the urging force of the push spring 6 that urges the brake arm 3 to the outside acts on the release wire 10, when the maintenance worker releases the hand from the round handle 18, the round handle 18 accelerates. Rotate.

  Therefore, by configuring the handle portion in a substantially disk shape, even if the maintenance worker inadvertently releases his hand from the round handle 18 after completion of the release operation of the brake device, the maintenance work can be performed on the accelerated round handle 18. The worker's hand does not come into contact, and the work can be performed more safely.

It is a front view of the brake device of the elevator hoisting machine in Embodiment 1 of this invention. It is a front view of the brake release apparatus of the elevator hoisting machine in Embodiment 1 of this invention. It is a front view of the brake release apparatus of the elevator hoisting machine in Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Brake drum 1a Braking surface 2 Brake shoe 3 Brake arm 4 Pin 5 Fixing member 6 Push spring 7 Movable iron core 8 Electromagnetic magnet 9 Release plate 10 Release wire 10a Retaining 11 Release wire cover 12 Release device stand 13 Support stand 14 Release wire winding Drum 15 Handle 16 Handle 17 Fixing plate 18 Round handle

Claims (4)

One end is provided in the brake device, and is moved to the other end side by a predetermined distance, thereby releasing the brake device,
The other end of the release wire is connected, and a release wire winding drum capable of winding the release wire;
A support for rotatably supporting the release wire winding drum;
A handle portion for manually rotating the release wire winding drum;
A brake release device for an elevator hoisting machine.   The brake release device for an elevator hoist according to claim 1, wherein the release wire winding drum is rotated by a round handle.   The brake release device for an elevator hoisting machine according to claim 1 or 2, wherein the handle portion is detachable from the release wire winding drum.   The brake release device for an elevator hoist according to any one of claims 1 to 3, wherein the handle portion is disposed at a position where the handle portion can be operated from a predetermined elevator hall.

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